Fig. 1. Selected procedures with substantial blood requirements are compared showing transfusion hemoglobin triggers and targets. The mean hemoglobin trigger for each procedure is designated by the left edge of the red bars  and the mean hemoglobin target by the right edge of the red bars . The span between the lowest and highest mean hemoglobin triggers was 2.8 g/dl and the span between the lowest and highest mean hemoglobin targets was 2.4 g/dl. AVR = aortic valve replacement; CABG = coronary artery bypass grafting; MVR = mitral valve replacement.